Pollution will certainly affect the amount of light that falls through the top layer. By making the top layer dirt repellent and by putting the road under a sufficient slope, we make sure that the effects of pollution as small as possible. The exact degree of pollution is not clear yet. Currently, we are performing experiments on this topic. The profits are expected to be lower than solar panels on rooftops. What the yield will be exactly is one of the research questions in the pilot.